Professor of Missiology and Migration at the Protestant Theological University in Amsterdam (PThU), the Netherlands
Migration, mission studies, Christianity in post-communist Europe, methodology, and theology
Methodology of writing history (theory formation, conceptualizations)
- German Society for Mission Studies (DGMW)
- European Research Network on Global Pentecostalism (GloPent)
- International Association for Mission Studies (IAMS)
- Wissenschaftliche Gesellschaft für Theologie (WGTh)